While creating an Azure Pipeline to backup all Azure Cosmos databases in a subscription, I had to list all collections from all databases. For that I wrote a script.
Feel free to adapt it in order to meet your needs! Enjoy!
#Retrieve database accounts $databaseAccounts = Get-AzResource | where ResourceType -Like "*database*" foreach($databaseAccount in $databaseAccounts){ Write-Host "#RG:" $databaseAccount.ResourceGroupName -ForegroundColor Green Write-Host "# databaseAccountName:" $databaseAccount.Name -ForegroundColor Green #Retrieve databases $databases = az cosmosdb database list --resource-group-name $databaseAccount.ResourceGroupName --name $databaseAccount.Name $databasesConverted = $databases | ConvertFrom-Json foreach($database in $databasesConverted){ $databaseName = $database.id Write-Host "# databaseName:" $databaseName -ForegroundColor Green #Retrieve collections $allcollections = "" $collections = az cosmosdb collection list --resource-group-name $databaseAccount.ResourceGroupName --name $databaseAccount.Name --db-name $databaseName $collectionsConverted = $collections | ConvertFrom-Json foreach($collection in $collectionsConverted){ $collectionName = $collection.id Write-Host "# collectionName: " $collectionName -ForegroundColor Green } } }